S
M
T
W
T
F
S
29
45°
32°
30
44°
31°
1
45°
38°
2
49°
40°
3
48°
40°
4
49°
36°
5
51°
31°
6
51°
31°
7
50°
32°
8
51°
37°
9
52°
33°
10
50°
31°
11
50°
31°
12
49°
33°
13
51°
38°
14
46°
37°
15
51°
36°
16
47°
33°
17
48°
34°
18
48°
38°
19
52°
37°
20
49°
38°
21
47°
39°
22
51°
36°
23
50°
38°
24
49°
35°
25
50°
28°
26
49°
28°
27
42°
30°
28
42°
32°
29
46°
30°
30
43°
40°
31
51°
38°
1
53°
34°
2
51°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Eugene
Eugene's December 2026 forecast shows daily high temperatures ranging from 42° to 53°, with overnight lows between 28° and 40°. The average high for December is 49° with an average low of 35°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Eugene. See also: January | February | March.
